Title :
Development of low-loss quasi-slanted SPUDT filters
Author :
Chvets, V.B. ; Rusakov, A.N. ; Orlov, V.S.
Author_Institution :
Moscow Radiocommun. Res. Inst., Moscow, Russia
Abstract :
The paper describes quasi-slanted SPUDTs with stepped electrodes. Using such transducers simplifies the fabrication of low-loss SAW filters for frequencies 400-600 MHz. To improve filter selectivity, two efficient simulation procedures have been developed, namely, the procedure of electrode withdrawal weighting of quasi-slanted SPUDTs and the procedure of simulating the effect of SAW diffraction on filter performance. The results of modeling and experiments for 385 MHz and 450 MHz WLAN filters are reported
Keywords :
UHF filters; interdigital transducers; losses; simulation; surface acoustic wave filters; ultrasonic diffraction; 385 MHz; 400 to 600 MHz; 450 MHz; SAW diffraction; WLAN filters; electrode withdrawal weighting; filter performance; filter selectivity; low-loss SAW filters; low-loss SPUDT filters; modeling; quasi-slanted SPUDT filters; simulation procedures; stepped electrodes; wireless LAN; Acoustic propagation; Band pass filters; Crosstalk; Electrodes; Frequency; Insertion loss; SAW filters; Surface acoustic waves; Transducers; Transversal filters;
Conference_Titel :
Ultrasonics Symposium, 2000 IEEE
Conference_Location :
San Juan
Print_ISBN :
0-7803-6365-5
DOI :
10.1109/ULTSYM.2000.922510
